Have tu been practising a martial art for más than 3 years? Have tu obtained your first Dan o higher? Are tu proficient with a variety of Oriental weapons and can use a chopstick to kill someone? CAN tu GET ACROSS A ROOM FULL OF FLOUR WITHOUT LEAVING FOOTPRINTS?
If tu answered "yes" to all of these questions, tu MAY BE A NINJA!
HOWEVER.
If tu find yourself glowing with pride because tu caught something that tu dropped, tu are not a ninja. Ninjas do not drop things por accident.
when tu enter a room tu auto-check the floor for pressure pads.or when tu look at,say,the eifle tower and think,"i could climb that in winter without any tools.